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← ScienceWhich outcome is expected when a sacrificial anode corrodes?
A)Cathodic protection becomes less effective✓
B)Oxidation rate of the cathode increases
C)Anode's reduction potential is lowered
D)Electrolyte conductivity near anode decreases
💡 Explanation
Cathodic protection weakens because the sacrificial anode undergoes preferential oxidation, therefore its *galvanic coupling* diminishes the protection it provides to the structure to be protected, rather than lowering anode reduction potential which is inherent.
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